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<h2><span class="refentrytitle"><a name="cairo-Types.top_of_page"></a>Types</span></h2>
<p>Types — Generic data types</p>
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<div class="refsect1">
<a name="cairo-Types.functions"></a><h2>Functions</h2>
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<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody><tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="cairo-Types.html#cairo-destroy-func-t" title="cairo_destroy_func_t ()">*cairo_destroy_func_t</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
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<div class="refsect1">
<a name="cairo-Types.other"></a><h2>Types and Values</h2>
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<col width="150px" class="name">
<col class="description">
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<td class="typedef_keyword">typedef</td>
<td class="function_name"><a class="link" href="cairo-Types.html#cairo-bool-t" title="cairo_bool_t">cairo_bool_t</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="cairo-Types.html#cairo-user-data-key-t" title="cairo_user_data_key_t">cairo_user_data_key_t</a></td>
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<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="cairo-Types.html#cairo-rectangle-int-t" title="cairo_rectangle_int_t">cairo_rectangle_int_t</a></td>
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<div class="refsect1">
<a name="cairo-Types.description"></a><h2>Description</h2>
<p>This section lists generic data types used in the cairo API.</p>
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<div class="refsect1">
<a name="cairo-Types.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="cairo-destroy-func-t"></a><h3>cairo_destroy_func_t ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*cairo_destroy_func_t<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span> *data</code></em>);</pre>
<p><a class="link" href="cairo-Types.html#cairo-destroy-func-t" title="cairo_destroy_func_t ()"><span class="type">cairo_destroy_func_t</span></a> the type of function which is called when a
data element is destroyed. It is passed the pointer to the data
element and should free any memory and resources allocated for it.</p>
<div class="refsect3">
<a name="cairo-destroy-func-t.parameters"></a><h4>Parameters</h4>
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<col width="150px" class="parameters_name">
<col class="parameters_description">
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<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>The data element being destroyed.</p></td>
<td class="parameter_annotations"> </td>
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<p class="since">Since: 1.0</p>
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<div class="refsect1">
<a name="cairo-Types.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="cairo-bool-t"></a><h3>cairo_bool_t</h3>
<pre class="programlisting">typedef int cairo_bool_t;
</pre>
<p><a class="link" href="cairo-Types.html#cairo-bool-t" title="cairo_bool_t"><span class="type">cairo_bool_t</span></a> is used for boolean values. Returns of type
<a class="link" href="cairo-Types.html#cairo-bool-t" title="cairo_bool_t"><span class="type">cairo_bool_t</span></a> will always be either 0 or 1, but testing against
these values explicitly is not encouraged; just use the
value as a boolean condition.</p>
<div class="informalexample"><pre class="programlisting">
 if (cairo_in_stroke (cr, x, y)) {
     /* do something */
 }
</pre></div>
<p class="since">Since: 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-user-data-key-t"></a><h3>cairo_user_data_key_t</h3>
<pre class="programlisting">typedef struct {
    int unused;
} cairo_user_data_key_t;
</pre>
<p><a class="link" href="cairo-Types.html#cairo-user-data-key-t" title="cairo_user_data_key_t"><span class="type">cairo_user_data_key_t</span></a> is used for attaching user data to cairo
data structures.  The actual contents of the struct is never used,
and there is no need to initialize the object; only the unique
address of a <span class="type">cairo_data_key_t</span> object is used.  Typically, you
would just use the address of a static <span class="type">cairo_data_key_t</span> object.</p>
<div class="refsect3">
<a name="cairo-user-data-key-t.members"></a><h4>Members</h4>
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<col width="300px" class="struct_members_name">
<col class="struct_members_description">
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<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-user-data-key-t.unused"></a>unused</code></em>;</p></td>
<td class="struct_member_description"><p>not used; ignore.</p></td>
<td class="struct_member_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-rectangle-int-t"></a><h3>cairo_rectangle_int_t</h3>
<pre class="programlisting">typedef struct {
    int x, y;
    int width, height;
} cairo_rectangle_int_t;
</pre>
<p>A data structure for holding a rectangle with integer coordinates.</p>
<div class="refsect3">
<a name="cairo-rectangle-int-t.members"></a><h4>Members</h4>
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<col width="300px" class="struct_members_name">
<col class="struct_members_description">
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<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.x"></a>x</code></em>;</p></td>
<td class="struct_member_description"><p>X coordinate of the left side of the rectangle</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.y"></a>y</code></em>;</p></td>
<td class="struct_member_description"><p>Y coordinate of the the top side of the rectangle</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.width"></a>width</code></em>;</p></td>
<td class="struct_member_description"><p>width of the rectangle</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.height"></a>height</code></em>;</p></td>
<td class="struct_member_description"><p>height of the rectangle</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
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<p class="since">Since: 1.10</p>
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